Tips on Power Consumption of Refrigerated Display Cabinets

There are many types of refrigerated display cabinets, but calculating their electricity use is not always straightforward. A home refrigerator typically consumes 1 to 2 kilowatt-hours per day—but how much power do store units use? How many watts do they draw, and what factors affect consumption? To answer these questions, continue reading this article on the Behsarma website:

How a refrigerated display cabinet works:

In general, refrigerators use a compressor, condenser, evaporator, expansion valve, and refrigerant to produce and maintain low temperatures. A refrigerated display cabinet follows the same refrigeration cycle: first, refrigerant gas is compressed in the compressor, which raises its pressure and temperature. In the second stage, the hot, high-pressure gas enters the condenser, passes through copper tubing, and is exposed to ambient air. The gas then releases heat to the surroundings and cools (condensation).

In the third stage, the refrigerant is still relatively warm and under pressure but is liquid; the motor drives it forward, and before it enters the evaporator the expansion valve causes a significant drop in pressure. Finally, in the fourth stage, refrigerant enters the evaporator, absorbs heat from the cabinet interior, lowers the temperature, and cools the chamber—and the cycle repeats continuously.

Factors that affect refrigerated display cabinet power use:

Refrigerated display cabinet electricity consumption depends on several variables. Below we review the most important factors:

• Cabinet or freezer type: Because of their larger size and volume, refrigerated display cabinets use more electricity than household refrigerators. They need larger compressors to keep food at the right temperature, which increases power draw. These units must stay at the correct temperature continuously (even when doors are closed), which also raises consumption. Glass panels and lighting for product display add further load.

• Location: Where the unit is installed has a major impact. Poor placement can noticeably increase consumption—for example, in a hot environment the cabinet must work harder to maintain internal temperature. High ambient humidity can also reduce efficiency.

• Size: Larger refrigerated display cabinets hold more product and run more, increasing electricity use. Size also affects product quality and hygiene: units that are too small may fail to hold safe temperatures and can lead to spoilage and waste, while appropriately sized cabinets maintain quality and food safety.

• Season: Warm seasons (spring and summer) typically increase consumption because the cabinet works harder to maintain temperature. In cooler seasons (autumn and winter), ambient temperature reduces load and consumption is generally lower.

• How the unit is used: Opening and closing doors affects power use. Keep doors open only briefly, load and unload quickly, and close doors promptly. Door closers or brakes can also help reduce consumption.

• Optimal temperature setting: Setting the internal temperature within the recommended range reduces consumption. If the setpoint is too low, the unit runs more—for example, holding 0 °C can use roughly 20% more energy than holding 5 °C.

Power consumption terms and definitions:

• Power: The rate of electricity use, measured in watts.

• Cost per unit: The charge for each unit of energy from the utility; tariff rates vary significantly by region.

• Hours of use: How many hours per day the equipment runs.

• Daily consumption in units: Total electricity units per day based on operating hours.

How to calculate refrigerated display cabinet electricity use:

Consumption depends on power rating and operating hours. Utilities bill in kilowatt-hours (kWh), found by multiplying power draw by hours of use. Refrigerated display cabinets run continuously and must hold internal temperature to keep food fresh. A typical unit may use about 0.18 kWh per hour of operation. Accurate calculation requires reviewing unit details and doing the math.

To estimate daily kWh for refrigerated display cabinets, multiply rated power (watts) by daily operating hours and divide by 1000. Label ratings can be approximate because actual draw varies with load and conditions, and nameplates do not account for external factors. A portable power meter is a practical way to measure real consumption by monitoring the unit over a full day.

Factors that can increase consumption in store refrigerators and frozen food cabinets include:

• Depending on store location, cooling systems may run harder in hotter environments to maintain performance.

• Older units often use worn components and consume more electricity.

• Staff frequently open freezer and refrigerator doors. Fewer door openings—limiting cold air loss and warm air entry—helps save energy.

• As components age, refrigerant may leak; internal temperature then rises slowly and the system needs more energy to protect product.

Costs for store refrigerators and freezers rise easily when equipment is unsuitable or failing. According to Energy.gov, refrigerated display cabinets can use up to 17,000 kWh per year, while large commercial freezers can reach 38,000 kWh—creating substantial electricity bills.

Ways to save energy on refrigerated display cabinets:

If energy use is a concern, the following maintenance practices can help lower electricity consumption:

• Regular condenser coil cleaning: Keeping condenser coils clean helps units run efficiently. Dirty coils force the refrigerator or freezer to work harder, increasing energy use and cost.

• Keep doors closed: Avoid leaving cabinet doors open. Remove what you need quickly and close the door. While doors are open, the compressor runs more and watt draw increases.

• Ensure adequate ventilation: Some units are squeezed between fixtures with poor airflow, which raises energy consumption.

• Preventive maintenance: Train staff to service equipment on schedule. Condenser coils and air filters covered in dust or ice should be cleaned promptly.

• Check door gaskets: Worn door seals prevent a tight close, allow cold air to escape, can spoil food, and force the unit to run longer to recover temperature.

• Remote temperature monitoring: Rising cabinet temperature increases energy use. Remote temperature trackers help spot problems before they become serious.

Summary:

Electricity use of refrigerated display cabinets is a major part of store operating costs. As energy prices rise, optimizing consumption on this equipment significantly reduces expenses. Cabinet type and size, location, season, usage habits, and temperature settings all matter. Old equipment, worn parts, and poor maintenance can sharply increase bills.

Regular, proper maintenance is essential. Accurate metering gives a clearer picture of real consumption and helps find faults. Choosing efficient cabinets, following sound maintenance practices, and monitoring performance are three key steps to lower power use and improve energy productivity in retail stores.

 Thank you for reading. We hope this article gave you a clearer view of refrigerated display cabinet power consumption and ways to cut energy costs. If you need specialist consulting or more information, the Behsarma team is ready to help.